Category:Server

  • Centos7 disk expansion

    Time:2021-10-22

    Others have detailed connections https://blog.csdn.net/haeydy/article/detai… Record the busy command steps sector — > physical partition — > physical volume (PV) – > volume group (VG) – > logical volume (LV) – > file system ##Check to see if space is available [[email protected] ~]# df -h #See if there are partitions available fdisk -l #If you […]

  • Memory Fragmentation in OpenResty and Nginx Shared Memory Zones

    Time:2021-10-22

    Memory fragmentation is a common problem in computer systems though many clever algorithms have emerged to tackle it. Memory fragmentation wastes free memory blocks scattered in a memory region and these free blocks cannot be merged as a whole to serve future requests for large memory blocks or cannot be returned to the operating system […]

  • PostgreSQL one click installation tutorial

    Time:2021-10-22

    PostgreSQL is a very powerful and open source client / server relational database management system (RDBMS). What is a database?Database is a warehouse that organizes, stores and manages data according to data structure.Each database has one or more different APIs for creating, accessing, managing, searching and copying saved data.We can also store data in files, […]

  • Total network connection timeout? Analyze how the network is connected from the four layer model

    Time:2021-10-22

    In the information age, almost everyone needs to use devices to access resources on the network. In this process, the connectivity realized by establishing network connection is the most basic function of computer network. Today, let’s share a knowledge about computer network——  How is the network connected? The browser generates a message and sends it […]

  • Zsh Development Guide (Part 20 code style)

    Time:2021-10-22

    Reading guide Because the shell script syntax is relatively flexible, and the programming languages familiar to the developers who write shell scripts are also quite different, it is easy for everyone to write code with different styles. It’s ok if you only use it by yourself. If you cooperate to develop the same project, different […]

  • Why does it take 90% of programmers shell – httpie a day to access the SMS verification code interface?

    Time:2021-10-22

    Accessing a SMS verification code interface is not complicated at all. If you are proficient, you can connect it in more than ten minutes. The problem is that there are thousands of SMS verification code service providers, and the interface parameters and selling prices of different service providers are different, which leads to a phenomenon. […]

  • Clickhouse series – fanwai – zero copy

    Time:2021-10-22

    This article will explain to the reader in detail the underlying details of 4K for each read when unordered storage is mentioned in Chapter 3. The appendix in Chapter 3 has explained to the readers that “this reason is that when the operating system reads the disk, according to the principle of data locality, it […]

  • 9 questions about the soul of starrocks’ dispute over “true, false and open source”

    Time:2021-10-22

    Yesterday, an article entitled“Starrocks open source – join hands in the future, the stars and the seaThe official account of the public issue has caused great controversy in the open source circle. This article, in the form of an open letter, described various difficulties and challenges faced by the current data analysis framework to “big […]

  • Solve the permission problem of docker.socket of vscode docker plug-in

    Time:2021-10-22

    Solution: kill all. Vscode related processes in the system (remote server if remote SSH is used)These processes are.vscodeFolder, so you can search directly.vscodeKill them and restart vscode to solve the problem. Knowledge point extension: Docker plug-in in vscode cannot connect Failed to connect. Is docker running Error: connect EACCES /var/run/docker.sock Cause analysis The reason is […]

  • What is WHQL Microsoft logo certification? Why is this certification required?

    Time:2021-10-22

    According to Microsoft’s latest regulations, Microsoft no longer accepts EV code signature certificate as driver digital signature, but requires driver developers to apply for WHQL certification to solve the problem of driver signature.Next, Xiaobian will elaborate with you on the specific scheme of WHQL Microsoft driver signature. What is WHQL certification? WHQL certification, also known […]

  • Centos7 housekeeper systemctl

    Time:2021-10-22

    Blog reference http://www.178linux.com/48343 http://www.178linux.com/48674 http://www.178linux.com/48563 http://www.jinbuguo.com/systemd/index.html Introduction to SYSTEMd SYSTEMd was developed by Lennart poetering, an employee of red hat company. SYSTEMd is the latest initialization system (init) in Linux system. Its main design purpose is to overcome the inherent shortcomings of sys V and improve the startup speed of the system. SYSTEMd and upstart […]

  • Replace the yum source of CentOS with Alibaba source

    Time:2021-10-22

    Simple understanding of several open source sites If you need to download some image files, such as open source software such as CentOS or Ubuntu, you can obtain them through the following image sites in China. Ali’s open source mirror station(https://opsx.alibaba.com/) Netease open source mirror station(http://mirrors.163.com/) Open source mirror station of Tsinghua University(https://mirrors.tuna.tsinghua…) Get to […]